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03-28-2009, 02:26 AM
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#26 |
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Registered User
Join Date: Mar 2009
Location: Kansas
Posts: 16
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Re: overcammed 350
For your combo you have too much duration and too tight of a lobe seperation that is why you have no torque, you need to be on a 112 with about 236 degrees probably max this is the cam that i had in my 11.5:1 455 pontiac with a tight 3000 stall and 4.10 and you have no combo like that
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03-28-2009, 02:30 AM
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#27 |
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Registered User
Join Date: Mar 2009
Location: Kansas
Posts: 16
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Re: overcammed 350
Sorry forgot to add this yes get rid of that dp and get a vacume sec... Imo im am not new to engines or c10's just to this messageboard
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03-28-2009, 01:03 PM
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#28 |
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Registered User
Join Date: Jan 2009
Location: Glaslyn, Sask
Posts: 131
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Re: overcammed 350
Well there was one day warm enough to fire up the truck so I pulled the carb off and adjusted the secondary throttle plates but I still couldn't get it to idle slow enough to adjust the mixture. So I ended up drilling a 1/16 hole in each primary plate. A funny thing happened. It was idling too fast when I put the carb back on so I was backing off the idle speed screw and when it got to a certain point it actually increased. Must have been when it came off of the transfer slots and started using the idle circuit. The idle cleaned up a lot and I can actually leave it running at 900 rpm without having to sit there and keep it running. I have a 50cc pump to try to fix the lean pop but I haven't had a chance to put it in yet. Its still too cold up here!
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85 GMC toy Lowered, newer box swap, 350 .060 over with AFR 195s, forged pistons, TCI TH350 1.83 60' 13.14 @ 100 on motor 1.49 60' 11.52 @ 116 w/150 shot 1952 Chevy truck project 1980 Z28 Camaro 1967 Camaro drag car 10.60@126 |
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04-13-2009, 11:26 PM
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#29 |
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Registered User
Join Date: Jan 2009
Location: Glaslyn, Sask
Posts: 131
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Re: overcammed 350
Well i am ashamed to admit it but I will anyway. In a previous post I said the timing was set to 36 degrees. I wanted to verify that today and lo and behold the timing was at around 23. Either the distributor moved (the bolt wasn't tightened very tight) or I set the timing without removing the vacuum line. Anyway now I have a truck that performs like its supposed to. No popping back, no hesitation, and the idle quality exceeds what I thought it ever could be(still rough but it doesn't stall). I am amazed at how much power it makes. Time for a few g-tech runs! Thanks for all the help and advice guys.
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85 GMC toy Lowered, newer box swap, 350 .060 over with AFR 195s, forged pistons, TCI TH350 1.83 60' 13.14 @ 100 on motor 1.49 60' 11.52 @ 116 w/150 shot 1952 Chevy truck project 1980 Z28 Camaro 1967 Camaro drag car 10.60@126 |
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04-14-2009, 02:22 PM
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#30 |
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Registered User
Join Date: Jul 2005
Location: Kernersville, NC
Posts: 599
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Re: overcammed 350
having that timing right make all the difference. i was up at the track and had mine about 7 degrees too low. bumped it up and knocked 4 tenths off my et and picked up 2 mph. gotta love it when it something simple. Chris.
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its a work in progess. 71 c-10 lwb, in the middle of frame off restoration. 69 c-10 swb, drag truck, 406 sbc, balanced, comp 292 cam, ported, polished, gasket matched, and bowl blended pro comp 210cc heads, 2.02/1.60 ferrea valves,1.6 roller rockers, re curved hei with msd 6al box, 2-step rev limter, accel 300+ wires, ported victor jr intake, holley 750 double pumper carb, dynomax 1 5/8 headers, 4 spd munci m-20 with super case and iron midplate, mr. gasket vertigate shifter, 5.38 pro gears with full spool, 33 spline moser axles and c-clip elimators, line-loc, 5 gal fuel cell, holley blue pump.   7.807 @ 88.37mph 1.60 60FT 80 g-20 van, tow rig, cammed 305, th350, 10 bolt 88 jeep wrangler, dd, 258, ax-15 swap, 4.5" lift, 33x12.50's, lockers, 3.55's |
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05-17-2009, 11:01 PM
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#31 |
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Registered User
Join Date: Jan 2009
Location: Glaslyn, Sask
Posts: 131
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Re: overcammed 350
Well I got the new transmission in. I went with the TCI th350 transbrake, manual valve body, reverse shift pattern. Took the truck out for a couple gtech runs on a closed course First run 14.07 at 98 with wheel spin and surging at the top end. The second run is the one in the video and I rolled into the throttle off the line. The truck didn't surge but definately ran out of power at the top of third gear. It was 14.45 at 95 mph.
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85 GMC toy Lowered, newer box swap, 350 .060 over with AFR 195s, forged pistons, TCI TH350 1.83 60' 13.14 @ 100 on motor 1.49 60' 11.52 @ 116 w/150 shot 1952 Chevy truck project 1980 Z28 Camaro 1967 Camaro drag car 10.60@126 |
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